This magnetic clasp is made from zinc, and is free of lead, nickel, cadmium. Hypoallergenic. 2-part epoxy glue is recommended for use with beaded braids. This clasp is super strong, perfect for bracelets or necklaces.
The only glue I recommend for attaching clasps to beaded and fiber braids is 2 part epoxy glue as it is the only glue to forms a secure, permanent bond. Step-by-Step instructions for using 2-Part Epoxy are on my blog http://kumihimoresource.com/kumihimo/2-part-epoxy/